The Siemens SENTRON 3VA2163-5HN32-0KH0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. Breaking capacity hits 187 kA at 240 V AC and still delivers 121 kA at 415 V, which puts it in the high-interrupting tier for industrial panel feeders and large motor branch circuits. The frame itself is rated for 756 A maximum, so this 63 A trip unit sits well within the frame's structural capacity.
What the ratings mean for fit
The 63 A continuous rating is flat from 40 °C to 70 °C, so you don't have to oversize for a hot panel — that's a real advantage when the enclosure sits near a furnace line or in a non-conditioned electrical room. The 187 kA at 240 V and 121 kA at 415 V tell you this breaker can handle high available fault current without cascading upstream; it's sized for main or large subfeed duty where the transformer is close. At 690 V the breaking capacity drops to 3.7 kA, so it's not a 690 V main breaker — keep it on the 240–500 V range where it earns its keep.
Panel integration and wiring
Dimensions are 86 mm deep, 105 mm wide, 181 mm tall — a standard 3-pole MCCB footprint that fits DIN-rail or direct-mount panel layouts common in industrial switchboards. The built-in shunt trip (STL) and two auxiliary switches plus one trip alarm switch (HQ) give you remote tripping capability and status feedback without adding external relay logic. No undervoltage release on this variant, so if you need UVR protection, that's a different order code in the 3VA family.
Designed for line protection — meaning it's configured for cable and busbar protection rather than motor or generator protection. The trip indicator and voltage trigger are present, giving visual and electrical trip indication. Communication function is not built in; this is a standalone breaker without integrated fieldbus or Ethernet. Power loss is 4 W maximum, negligible for panel thermal budgeting.